Refactor rendering system: Introduced RenderObject abstraction, replaced RenderBoundary with ObserverListener, and updated slot calculation for inventory types.

Signed-off-by: Chaoscaot <max@maxsp.de>

BauSystem/BauSystem_Main/build.gradle.kts

@@ -34,6 +34,7 @@ dependencies {
     compileOnly(libs.classindex)
     annotationProcessor(libs.classindex)
     compileOnly(project(":SpigotCore", "default"))
+    compileOnly(project(":KotlinCore", "default"))
 
     compileOnly(libs.axiom)
     compileOnly(libs.authlib)

BauSystem/BauSystem_Main/src/BauSystem.properties

@@ -834,6 +834,10 @@ SKIN_NO_REGION = §7You are not in a region with a changealbe skin
 SKIN_ALREADY_EXISTS = §cThis skin already exists like this
 SKIN_MESSAGE = §7Skin created
 SKIN_MESSAGE_HOVER = §eClick to copy for YoyoNow and send
+# Blast Resistance
+BLASTRESISTANCE_HELP = §8/§eblastresistance §8-§7 Calculate min/max and average blast resistance of current clipboard
+BLASTRESISTANCE_NO_CLIPBOARD = §cYou currently do not have a clipboard to be used.
+BLASTRESISTANCE_RESULT = §7BlastResistance §8>>§7 Min§8: §e{0}§7   Max§8: §e{1}§7   Avg§8: §e{2}
 # Panzern
 PANZERN_HELP = §8/§epanzern §8[§7Block§8] §8[§7Slab§8] §8- §7Armor your WorldEdit selection
 PANZERN_PREPARE1 = §71. Check, if barrels reach until border of armor.

BauSystem/BauSystem_Main/src/BauSystem_de.properties

@@ -772,6 +772,10 @@ SKIN_NO_REGION = §7Du steht in keiner Region, welche mit einem Skin versehen we
 SKIN_ALREADY_EXISTS = §cDieser Skin existiert in der Form bereits
 SKIN_MESSAGE = §7Skin erstellt
 SKIN_MESSAGE_HOVER = §eKlicken zum kopieren für YoyoNow und an diesen senden
+# Blast Resistance
+BLASTRESISTANCE_HELP = §8/§eblastresistance §8-§7 Minimal-, Maximal- und durchschnittliche Sprengfestigkeit des aktuellen Inhalts der Zwischenablage berechnen
+BLASTRESISTANCE_NO_CLIPBOARD = §cDerzeit steht Ihnen keine Zwischenablage zur Verfügung.
+BLASTRESISTANCE_RESULT = §7BlastResistance §8>>§7 Min§8: §e{0}§7   Max§8: §e{1}§7   Avg§8: §e{2}
 # Panzern
 PANZERN_HELP = §8/§epanzern §8[§7Block§8] §8[§7Slab§8] §8- §7Panzer deine WorldEdit Auswahl
 PANZERN_PREPARE1 = §71. Gucke nochmal nach, ob Läufe auch bis zur Panzergrenze führen.

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/design/endstone/DesignEndStone.java

@@ -21,9 +21,7 @@ package de.steamwar.bausystem.features.design.endstone;
 
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.region.Region;
-import de.steamwar.entity.REntity;
-import de.steamwar.entity.REntityServer;
-import de.steamwar.entity.RFallingBlockEntity;
+import de.steamwar.entity.*;
 import net.md_5.bungee.api.ChatMessageType;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -59,15 +57,15 @@ public class DesignEndStone {
                 .filter(material -> material.getBlastResistance() > region.getGameModeConfig().Schematic.MaxDesignBlastResistance)
                 .collect(Collectors.toSet());
         calculateFromBottom = region.getGameModeConfig().Arena.NoFloor;
+    }
 
-        entityServer.setCallback((player, rEntity, entityAction) -> {
-            if (entityAction != REntityServer.EntityAction.ATTACK) return;
-            Location location = new Location(WORLD, rEntity.getX(), rEntity.getY(), rEntity.getZ());
-            Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
-                location.getBlock().breakNaturally();
-                calc();
-            }, 1);
-        });
+    private void interact(Player player, RInteraction entity, REntityAction action) {
+        if (action != REntityAction.ATTACK) return;
+        Location location = new Location(WORLD, entity.getX(), entity.getY(), entity.getZ());
+        Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
+            location.getBlock().breakNaturally();
+            calc();
+        }, 1);
     }
 
     public void calc() {
@@ -110,12 +108,15 @@ public class DesignEndStone {
                         Material material = WORLD.getBlockAt(cx, cy, cz).getType();
 
                         if (material != Material.WATER && material != Material.LAVA && limited.contains(material)) {
-                            Location location = new Location(WORLD, cx + 0.5, cy, cz + 0.5);
+                            Location location = new Location(WORLD, cx, cy, cz);
                             if (!locations.add(location)) break;
-                            RFallingBlockEntity entity = new RFallingBlockEntity(entityServer, location, Material.RED_STAINED_GLASS);
-                            entity.setNoGravity(true);
+                            RBlockDisplay entity = new RBlockDisplay(entityServer, location);
+                            entity.setBlock(Material.RED_STAINED_GLASS.createBlockData());
                             entity.setGlowing(true);
                             entities.add(entity);
+                            RInteraction interaction = new RInteraction(entityServer, location);
+                            interaction.setCallback(this::interact);
+                            entities.add(interaction);
                             break;
                         } else if (!material.isAir() && material != Material.WATER && material != Material.LAVA) {
                             break;

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/detonator/Detonator.java

@@ -26,8 +26,9 @@ import de.steamwar.bausystem.features.autostart.AutostartListener;
 import de.steamwar.bausystem.features.detonator.storage.DetonatorStorage;
 import de.steamwar.bausystem.features.detonator.storage.ItemStorage;
 import de.steamwar.core.SWPlayer;
+import de.steamwar.entity.RBlockDisplay;
 import de.steamwar.entity.REntityServer;
-import de.steamwar.entity.RFallingBlockEntity;
+import de.steamwar.entity.RInteraction;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.experimental.UtilityClass;
@@ -58,10 +59,6 @@ public class Detonator {
         @Override
         public void onMount(SWPlayer player) {
             entities.addPlayer(player.getPlayer());
-            entities.setCallback((player1, entity, action) -> {
-                Vector vector = new Vector(entity.getX(), entity.getY(), entity.getZ());
-                DetonatorListener.addLocationToDetonator(vector.toLocation(player.getWorld()).getBlock().getLocation(), player1);
-            });
         }
 
         @Override
@@ -70,8 +67,6 @@ public class Detonator {
         }
     }
 
-    private static final Vector HALF = new Vector(0.5, 0, 0.5);
-
     public static boolean isDetonator(ItemStack itemStack) {
         return ItemStorage.isDetonator(itemStack);
     }
@@ -79,8 +74,14 @@ public class Detonator {
     public static void showDetonator(Player p, List<Location> locs) {
         DetonatorComponent detonatorComponent = SWPlayer.of(p).getComponentOrDefault(DetonatorComponent.class, DetonatorComponent::new);
         locs.forEach(location -> {
-            RFallingBlockEntity entity = new RFallingBlockEntity(detonatorComponent.entities, location.clone().add(HALF), Material.RED_STAINED_GLASS);
-            entity.setNoGravity(true);
+            RBlockDisplay blockDisplay = new RBlockDisplay(detonatorComponent.entities, location);
+            blockDisplay.setBlock(Material.RED_STAINED_GLASS.createBlockData());
+
+            RInteraction interaction = new RInteraction(detonatorComponent.entities, location);
+            interaction.setCallback((player, entity, action) -> {
+                Vector vector = new Vector(entity.getX(), entity.getY(), entity.getZ());
+                DetonatorListener.addLocationToDetonator(vector.toLocation(player.getWorld()).getBlock().getLocation(), player);
+            });
         });
     }
 

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/experimental/ExperimentalCommand.java

@@ -0,0 +1,31 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.experimental;
+
+import de.steamwar.command.SWCommand;
+import de.steamwar.linkage.Linked;
+
+@Linked
+public class ExperimentalCommand extends SWCommand {
+
+    public ExperimentalCommand() {
+        super("experimental", "experiment");
+    }
+}

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/experimental/redstone_engine/RedstoneEngine.java

@@ -0,0 +1,135 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.experimental.redstone_engine;
+
+import de.steamwar.bausystem.features.experimental.ExperimentalCommand;
+import de.steamwar.bausystem.region.Region;
+import de.steamwar.bausystem.utils.ScoreboardElement;
+import de.steamwar.command.AbstractSWCommand;
+import de.steamwar.command.SWCommand;
+import de.steamwar.linkage.Linked;
+import io.papermc.paper.configuration.WorldConfiguration;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.title.TitlePart;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+
+import java.util.Collection;
+import java.util.List;
+
+@AbstractSWCommand.PartOf(ExperimentalCommand.class)
+@Linked
+public class RedstoneEngine extends SWCommand implements Listener, ScoreboardElement {
+
+    public RedstoneEngine() {
+        super("");
+    }
+
+    private WorldConfiguration.Misc getConfig() {
+        return ((CraftWorld) Bukkit.getWorlds().get(0)).getHandle().paperConfig().misc;
+    }
+
+    @Register("redstone")
+    @Register("redstoneengine")
+    public void setRedstoneEngine(Player player, @StaticValue("alternate_current") String __, WorldConfiguration.Misc.AlternateCurrentUpdateOrder updateOrder) {
+        WorldConfiguration.Misc misc = getConfig();
+        misc.redstoneImplementation = WorldConfiguration.Misc.RedstoneImplementation.ALTERNATE_CURRENT;
+        misc.alternateCurrentUpdateOrder = updateOrder;
+        broadcastTitle(Bukkit.getOnlinePlayers());
+    }
+
+    @Register("redstone")
+    @Register("redstoneengine")
+    public void setRedstoneEngine(Player player, WorldConfiguration.Misc.RedstoneImplementation implementation) {
+        getConfig().redstoneImplementation = implementation;
+        broadcastTitle(Bukkit.getOnlinePlayers());
+    }
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        WorldConfiguration.Misc misc = getConfig();
+        if (misc.redstoneImplementation != WorldConfiguration.Misc.RedstoneImplementation.EIGENCRAFT) {
+            broadcastTitle(List.of(event.getPlayer()));
+        }
+    }
+
+    private void broadcastTitle(Collection<? extends Player> players) {
+        WorldConfiguration.Misc misc = getConfig();
+        Component title = switch (misc.redstoneImplementation) {
+            case VANILLA -> Component.text("⚠").color(NamedTextColor.RED).append(Component.text(" Redstone: Vanilla ").color(NamedTextColor.WHITE)).append(Component.text("⚠").color(NamedTextColor.RED));
+            case EIGENCRAFT -> Component.text("Redstone: Eigencraft");
+            case ALTERNATE_CURRENT -> Component.text("⚠").color(NamedTextColor.RED).append(Component.text(" Redstone: AC ").color(NamedTextColor.WHITE)).append(Component.text("⚠").color(NamedTextColor.RED));
+        };
+        Component subtitle;
+        if (misc.redstoneImplementation != WorldConfiguration.Misc.RedstoneImplementation.ALTERNATE_CURRENT) {
+            subtitle = Component.text().build();
+        } else {
+            subtitle = switch (misc.alternateCurrentUpdateOrder) {
+                case VERTICAL_FIRST_INWARD -> Component.text("Y first inwards"); // Y before XZ
+                case VERTICAL_FIRST_OUTWARD -> Component.text("Y first outwards"); // XZ before Y
+                case HORIZONTAL_FIRST_INWARD -> Component.text("XZ first inwards"); // Y before XZ
+                case HORIZONTAL_FIRST_OUTWARD -> Component.text("XZ first outwards"); // XZ before Y
+            };
+        }
+        players.forEach(player -> {
+            player.sendTitlePart(TitlePart.TITLE, title);
+            player.sendTitlePart(TitlePart.SUBTITLE, subtitle);
+        });
+    }
+
+    @Override
+    public ScoreboardGroup getGroup() {
+        return ScoreboardGroup.FOOTER;
+    }
+
+    @Override
+    public int order() {
+        return Integer.MAX_VALUE;
+    }
+
+    @Override
+    public String get(Region region, Player p) {
+        WorldConfiguration.Misc misc = getConfig();
+        switch (misc.redstoneImplementation) {
+            case ALTERNATE_CURRENT:
+                switch (misc.alternateCurrentUpdateOrder) {
+                    case VERTICAL_FIRST_INWARD:
+                        return "§eRedstone§8: §cAC §8(§7Y in§8)";
+                    case VERTICAL_FIRST_OUTWARD:
+                        return "§eRedstone§8: §cAC §8(§7Y out§8)";
+                    case HORIZONTAL_FIRST_INWARD:
+                        return "§eRedstone§8: §cAC §8(§7XZ in§8)";
+                    case HORIZONTAL_FIRST_OUTWARD:
+                        return "§eRedstone§8: §cAC §8(§7XZ out§8)";
+                }
+                return "§eRedstone§8: §cAC";
+            case EIGENCRAFT:
+                return null;
+            case VANILLA:
+            default:
+                return "§eRedstone§8: §cVanilla";
+        }
+    }
+}

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/KillcheckerVisualizer.java

@@ -24,9 +24,9 @@ import de.steamwar.bausystem.region.Point;
 import de.steamwar.bausystem.region.Region;
 import de.steamwar.bausystem.utils.bossbar.BauSystemBossbar;
 import de.steamwar.bausystem.utils.bossbar.BossBarService;
+import de.steamwar.entity.RBlockDisplay;
 import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
-import de.steamwar.entity.RFallingBlockEntity;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.World;
@@ -290,8 +290,8 @@ public class KillcheckerVisualizer {
                 }
                 rEntities.get(point).die();
             }
-            RFallingBlockEntity entity = new RFallingBlockEntity(outlinePoints.contains(point) ? outline : inner, point.toLocation(WORLD, 0.5, 0, 0.5), MATERIALS[Math.min(count - 1, MATERIALS.length) - 1]);
-            entity.setNoGravity(true);
+            RBlockDisplay entity = new RBlockDisplay(outlinePoints.contains(point) ? outline : inner, point.toLocation(WORLD, 0.5, 0, 0.5));
+            entity.setBlock(MATERIALS[Math.min(count - 1, MATERIALS.length) - 1].createBlockData());
             rEntities.put(point, entity);
             if (outlinePoints.contains(point)) outlinePointsCache.add(point);
             killCount.put(point, count);

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorCursor.java

@@ -19,7 +19,6 @@
 
 package de.steamwar.bausystem.features.simulator;
 
-import com.comphenix.tinyprotocol.TinyProtocol;
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.Permission;
 import de.steamwar.bausystem.SWUtils;
@@ -38,77 +37,88 @@ import de.steamwar.bausystem.features.simulator.gui.SimulatorGui;
 import de.steamwar.bausystem.features.simulator.gui.base.SimulatorBaseGui;
 import de.steamwar.bausystem.utils.BauMemberUpdateEvent;
 import de.steamwar.bausystem.utils.ItemUtils;
-import de.steamwar.bausystem.utils.RayTraceUtils;
+import de.steamwar.core.SWPlayer;
+import de.steamwar.cursor.Cursor;
 import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
-import de.steamwar.entity.RFallingBlockEntity;
 import de.steamwar.inventory.SWAnvilInv;
 import de.steamwar.linkage.Linked;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
-import net.minecraft.network.protocol.game.ServerboundMovePlayerPacket;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.Material;
-import org.bukkit.World;
-import org.bukkit.block.BlockFace;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.block.Action;
-import org.bukkit.event.player.*;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryDragEvent;
+import org.bukkit.event.player.PlayerDropItemEvent;
+import org.bukkit.event.player.PlayerItemHeldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.event.player.PlayerToggleSneakEvent;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.Vector;
 
-import java.util.*;
-import java.util.function.BiFunction;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
 @Linked
 public class SimulatorCursor implements Listener {
 
-    private static final World WORLD = Bukkit.getWorlds().get(0);
-
-    private static Map<Player, CursorType> cursorType = Collections.synchronizedMap(new HashMap<>());
-    private static Map<Player, REntityServer> cursors = Collections.synchronizedMap(new HashMap<>());
-    private static final Set<Player> calculating = new HashSet<>();
+    private static final Map<Player, CursorType> cursorType = Collections.synchronizedMap(new HashMap<>());
+    private static final Map<Player, REntityServer> emptyTargetServers = Collections.synchronizedMap(new HashMap<>());
 
     public static boolean isSimulatorItem(ItemStack itemStack) {
         return ItemUtils.isItem(itemStack, "simulator");
     }
 
-    public SimulatorCursor() {
-        BiFunction<Player, ServerboundMovePlayerPacket, Object> function = (player, object) -> {
-            calcCursor(player);
-            return object;
-        };
-        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.Pos.class, function);
-        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.Rot.class, function);
-        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.PosRot.class, function);
+    private static boolean hasSimulatorItem(Player player) {
+        return isSimulatorItem(player.getInventory().getItemInMainHand()) || isSimulatorItem(player.getInventory().getItemInOffHand());
+    }
+
+    private static void scheduleCursorUpdate(Player player) {
+        BauSystem.runTaskLater(BauSystem.getInstance(), () -> calcCursor(player), 1);
     }
 
     @EventHandler
     public void onPlayerJoin(PlayerJoinEvent event) {
         if (!Permission.BUILD.hasPermission(event.getPlayer())) return;
-        Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
-            calcCursor(event.getPlayer());
-        }, 0);
+        scheduleCursorUpdate(event.getPlayer());
     }
 
     @EventHandler
     public void onPlayerDropItem(PlayerDropItemEvent event) {
         if (!Permission.BUILD.hasPermission(event.getPlayer())) return;
-        calcCursor(event.getPlayer());
+        scheduleCursorUpdate(event.getPlayer());
     }
 
     @EventHandler
     public void onPlayerItemHeld(PlayerItemHeldEvent event) {
         if (!Permission.BUILD.hasPermission(event.getPlayer())) return;
-        Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
-            calcCursor(event.getPlayer());
-        }, 1);
+        scheduleCursorUpdate(event.getPlayer());
+    }
+
+    @EventHandler
+    public void onInventoryClick(InventoryClickEvent event) {
+        if (!(event.getWhoClicked() instanceof Player player)) return;
+        if (!Permission.BUILD.hasPermission(player)) return;
+        scheduleCursorUpdate(player);
+    }
+
+    @EventHandler
+    public void onInventoryDrag(InventoryDragEvent event) {
+        if (!(event.getWhoClicked() instanceof Player player)) return;
+        if (!Permission.BUILD.hasPermission(player)) return;
+        scheduleCursorUpdate(player);
     }
 
     @EventHandler
@@ -119,10 +129,7 @@ public class SimulatorCursor implements Listener {
     @EventHandler
     public void onPlayerQuit(PlayerQuitEvent event) {
         cursorType.remove(event.getPlayer());
-        cursors.remove(event.getPlayer());
-        synchronized (calculating) {
-            calculating.remove(event.getPlayer());
-        }
+        removeCursor(event.getPlayer());
     }
 
     private static final Map<Player, Long> LAST_SNEAKS = new HashMap<>();
@@ -138,7 +145,7 @@ public class SimulatorCursor implements Listener {
     public void onPlayerToggleSneak(PlayerToggleSneakEvent event) {
         if (!event.isSneaking()) return;
         Player player = event.getPlayer();
-        if (!isSimulatorItem(player.getInventory().getItemInMainHand()) && !isSimulatorItem(player.getInventory().getItemInOffHand())) {
+        if (!hasSimulatorItem(player)) {
             return;
         }
         if (LAST_SNEAKS.containsKey(player)) {
@@ -164,17 +171,10 @@ public class SimulatorCursor implements Listener {
     }
 
     public static void calcCursor(Player player) {
-        synchronized (calculating) {
-            if (calculating.contains(player)) return;
-            calculating.add(player);
-        }
-        if (!Permission.BUILD.hasPermission(player) || (!isSimulatorItem(player.getInventory().getItemInMainHand()) && !isSimulatorItem(player.getInventory().getItemInOffHand()))) {
-            if (removeCursor(player) || SimulatorWatcher.show(null, player)) {
+        if (!Permission.BUILD.hasPermission(player) || !hasSimulatorItem(player)) {
+            if (removeCursor(player) | SimulatorWatcher.show(null, player)) {
                 SWUtils.sendToActionbar(player, "");
             }
-            synchronized (calculating) {
-                calculating.remove(player);
-            }
             return;
         }
 
@@ -183,203 +183,98 @@ public class SimulatorCursor implements Listener {
             removeCursor(player);
             SimulatorWatcher.show(null, player);
             SWUtils.sendToActionbar(player, "§cGenerating Stab");
-            synchronized (calculating) {
-                calculating.remove(player);
-            }
             return;
         }
 
         SimulatorWatcher.show(simulator, player);
-        List<REntity> entities = SimulatorWatcher.getEntitiesOfSimulator(simulator);
-        RayTraceUtils.RRayTraceResult rayTraceResult = RayTraceUtils.traceREntity(player, player.getLocation(), entities);
-        if (rayTraceResult == null) {
-            removeCursor(player);
-            if (simulator == null) {
-                SWUtils.sendToActionbar(player, "§eSelect Simulator");
-            } else {
-                SWUtils.sendToActionbar(player, "§eOpen Simulator");
-            }
-            synchronized (calculating) {
-                calculating.remove(player);
-            }
-            return;
+        Cursor cursor = getOrCreateCursor(player, simulator, cursorType.getOrDefault(player, CursorType.TNT));
+        cursor.renderDeduplicated();
+    }
+
+    private static Cursor getOrCreateCursor(Player player, Simulator simulator, CursorType type) {
+        REntityServer targetServer = simulator == null ? emptyTargetServers.computeIfAbsent(player, __ -> new REntityServer()) : SimulatorWatcher.getEntityServerOfSimulator(simulator);
+        SWPlayer swPlayer = SWPlayer.of(player);
+        Optional<Cursor> activeCursor = swPlayer.getComponent(Cursor.class);
+
+        Cursor cursor = activeCursor.orElse(null);
+        if (cursor == null || cursor.getTargetServer() != targetServer) {
+            swPlayer.removeComponent(Cursor.class);
+            cursor = new Cursor(
+                    targetServer,
+                    player,
+                    Material.GLASS,
+                    type.material,
+                    type.cursorModes,
+                    (location, hitEntity, action) -> handlePlayerClick(player, location, hitEntity, action),
+                    (location, hitEntity) -> sendCursorActionbar(player, SimulatorStorage.getSimulator(player), location != null, hitEntity.isPresent())
+            );
+        } else {
+            cursor.setCursorMaterial(type.material);
+            cursor.setAllowedCursorModes(type.cursorModes);
         }
 
-        showCursor(player, rayTraceResult, simulator != null);
-        synchronized (calculating) {
-            calculating.remove(player);
-        }
+        return cursor;
     }
 
     private static synchronized boolean removeCursor(Player player) {
-        REntityServer entityServer = cursors.get(player);
-        boolean hadCursor = entityServer != null && !entityServer.getEntities().isEmpty();
-        if (entityServer != null) {
-            entityServer.getEntities().forEach(REntity::die);
+        Optional<Cursor> cursor = SWPlayer.of(player).getComponent(Cursor.class);
+        cursor.ifPresent(__ -> SWPlayer.of(player).removeComponent(Cursor.class));
+        REntityServer emptyTargetServer = emptyTargetServers.remove(player);
+        if (emptyTargetServer != null) {
+            emptyTargetServer.close();
         }
-        return hadCursor;
+        return cursor.isPresent();
     }
 
-    private static synchronized void showCursor(Player player, RayTraceUtils.RRayTraceResult rayTraceResult, boolean hasSimulatorSelected) {
-        REntityServer entityServer = cursors.computeIfAbsent(player, __ -> {
-            REntityServer rEntityServer = new REntityServer();
-            rEntityServer.addPlayer(player);
-            return rEntityServer;
-        });
-
-        CursorType type = cursorType.getOrDefault(player, CursorType.TNT);
-        REntity hitEntity = rayTraceResult.getHitEntity();
-        Location location = hitEntity != null ? new Vector(hitEntity.getX(), hitEntity.getY(), hitEntity.getZ()).toLocation(WORLD) :
-                type.position.apply(player, rayTraceResult).toLocation(WORLD);
-
-        Material material = hitEntity != null ? Material.GLASS : type.getMaterial();
-        List<RFallingBlockEntity> entities = entityServer.getEntitiesByType(RFallingBlockEntity.class);
-        entities.removeIf(rFallingBlockEntity -> {
-            if (rFallingBlockEntity.getMaterial() != material) {
-                rFallingBlockEntity.die();
-                return true;
-            }
-            rFallingBlockEntity.move(location);
-            return false;
-        });
-        if (entities.isEmpty()) {
-            RFallingBlockEntity rFallingBlockEntity = new RFallingBlockEntity(entityServer, location, material);
-            rFallingBlockEntity.setNoGravity(true);
-            if (material == Material.GLASS) {
-                rFallingBlockEntity.setGlowing(true);
-            }
-        }
-
-        if (hasSimulatorSelected) {
-            if (hitEntity != null) {
-                SWUtils.sendToActionbar(player, "§eEdit Position");
-            } else {
-                SWUtils.sendToActionbar(player, "§eAdd new " + type.name);
-            }
-        } else {
+    private static void sendCursorActionbar(Player player, Simulator simulator, boolean hasCursorLocation, boolean hasHitEntity) {
+        if (!hasCursorLocation) {
+            SWUtils.sendToActionbar(player, simulator == null ? "§eSelect Simulator" : "§eOpen Simulator");
+        } else if (simulator == null) {
             SWUtils.sendToActionbar(player, "§eCreate new Simulator");
-        }
-    }
-
-    public static Vector getPosFree(Player player, RayTraceUtils.RRayTraceResult result) {
-        Vector pos = result.getHitPosition();
-
-        BlockFace face = result.getHitBlockFace();
-        if (face != null) {
-            switch (face) {
-                case DOWN:
-                    pos.setY(pos.getY() - 0.98);
-                    break;
-                case EAST:
-                    pos.setX(pos.getX() + 0.49);
-                    break;
-                case WEST:
-                    pos.setX(pos.getX() - 0.49);
-                    break;
-                case NORTH:
-                    pos.setZ(pos.getZ() - 0.49);
-                    break;
-                case SOUTH:
-                    pos.setZ(pos.getZ() + 0.49);
-                    break;
-                default:
-                    break;
-            }
-
-            if (face.getModY() == 0 && player.isSneaking()) {
-                pos.setY(pos.getY() - 0.49);
-            }
-        }
-
-        if (!player.isSneaking()) {
-            pos.setX(pos.getBlockX() + 0.5);
-            if (face == null || face.getModY() == 0) {
-                pos.setY(pos.getBlockY() + 0.0);
-            }
-            pos.setZ(pos.getBlockZ() + 0.5);
-        }
-
-        return pos;
-    }
-
-    private static Vector getPosBlockAligned(Player player, RayTraceUtils.RRayTraceResult result) {
-        Vector pos = result.getHitPosition();
-
-        BlockFace face = result.getHitBlockFace();
-        if (face != null) {
-            switch (face) {
-                case DOWN:
-                    pos.setY(pos.getY() - 0.98);
-                    break;
-                case EAST:
-                    pos.setX(pos.getX() + 0.49);
-                    break;
-                case WEST:
-                    pos.setX(pos.getX() - 0.49);
-                    break;
-                case NORTH:
-                    pos.setZ(pos.getZ() - 0.49);
-                    break;
-                case SOUTH:
-                    pos.setZ(pos.getZ() + 0.49);
-                    break;
-                default:
-                    break;
-            }
-        }
-
-        pos.setX(pos.getBlockX() + 0.5);
-        if (pos.getY() - pos.getBlockY() != 0 && face == BlockFace.UP) {
-            pos.setY(pos.getBlockY() + 1.0);
+        } else if (hasHitEntity) {
+            SWUtils.sendToActionbar(player, "§eEdit Position");
         } else {
-            pos.setY(pos.getBlockY());
+            SWUtils.sendToActionbar(player, "§eAdd new " + cursorType.getOrDefault(player, CursorType.TNT).name);
         }
-        pos.setZ(pos.getBlockZ() + 0.5);
-        return pos;
     }
 
     @Getter
     @AllArgsConstructor
     public enum CursorType {
-        TNT(Material.TNT, Material.GUNPOWDER, SimulatorCursor::getPosFree, "TNT", vector -> new TNTElement(vector).add(new TNTPhase())),
-        REDSTONE_BLOCK(Material.REDSTONE_BLOCK, Material.REDSTONE, SimulatorCursor::getPosBlockAligned, "Redstone Block", vector -> new RedstoneElement(vector).add(new RedstonePhase())),
-        OBSERVER(Material.OBSERVER, Material.QUARTZ, SimulatorCursor::getPosBlockAligned, "Observer", vector -> new ObserverElement(vector).add(new ObserverPhase())),
+        TNT(Material.TNT, Material.GUNPOWDER, List.of(Cursor.CursorMode.FREE, Cursor.CursorMode.SURFACE_ALIGNED), "TNT", vector -> new TNTElement(vector).add(new TNTPhase())),
+        REDSTONE_BLOCK(Material.REDSTONE_BLOCK, Material.REDSTONE, List.of(Cursor.CursorMode.BLOCK_ALIGNED), "Redstone Block", vector -> new RedstoneElement(vector).add(new RedstonePhase())),
+        OBSERVER(Material.OBSERVER, Material.QUARTZ, List.of(Cursor.CursorMode.BLOCK_ALIGNED), "Observer", vector -> new ObserverElement(vector).add(new ObserverPhase())),
         ;
 
         public final Material material;
         public final Material nonSelectedMaterial;
-        public final BiFunction<Player, RayTraceUtils.RRayTraceResult, Vector> position;
+        public final List<Cursor.CursorMode> cursorModes;
         public final String name;
         public final Function<Vector, SimulatorElement<?>> elementFunction;
     }
 
-    @EventHandler
-    public void onPlayerInteract(PlayerInteractEvent event) {
-        if (!Permission.BUILD.hasPermission(event.getPlayer())) return;
-        if (!ItemUtils.isItem(event.getItem(), "simulator")) {
+    private static void handlePlayerClick(Player player, Location cursorLocation, Optional<REntity> hitEntity, Action action) {
+        if (!Permission.BUILD.hasPermission(player)) return;
+        if (!hasSimulatorItem(player)) {
             return;
         }
 
-        event.setCancelled(true);
-        Player player = event.getPlayer();
         Simulator simulator = SimulatorStorage.getSimulator(player);
 
-        if (event.getAction() == Action.LEFT_CLICK_BLOCK || event.getAction() == Action.LEFT_CLICK_AIR) {
+        if (action == Action.LEFT_CLICK_BLOCK || action == Action.LEFT_CLICK_AIR) {
             if (simulator == null) {
                 return;
             }
-            SimulatorExecutor.run(event.getPlayer(), simulator, null);
+            SimulatorExecutor.run(player, simulator, null);
             return;
         }
 
-        if (event.getAction() != Action.RIGHT_CLICK_BLOCK && event.getAction() != Action.RIGHT_CLICK_AIR) {
+        if (action != Action.RIGHT_CLICK_BLOCK && action != Action.RIGHT_CLICK_AIR) {
             return;
         }
 
-
-        RayTraceUtils.RRayTraceResult rayTraceResult = RayTraceUtils.traceREntity(player, player.getLocation(), SimulatorWatcher.getEntitiesOfSimulator(simulator));
         if (simulator == null) {
-            if (rayTraceResult == null) {
+            if (cursorLocation == null) {
                 SimulatorStorage.openSimulatorSelector(player);
             } else {
                 SWAnvilInv anvilInv = new SWAnvilInv(player, "Name");
@@ -395,7 +290,7 @@ public class SimulatorCursor implements Listener {
                     }
                     sim = new Simulator(s);
                     SimulatorStorage.addSimulator(s, sim);
-                    createElement(player, rayTraceResult, sim);
+                    createElement(player, cursorLocation, sim);
                     SimulatorStorage.setSimulator(player, sim);
                 });
                 anvilInv.open();
@@ -403,57 +298,56 @@ public class SimulatorCursor implements Listener {
             return;
         }
 
-        if (rayTraceResult == null) {
+        if (cursorLocation == null) {
             new SimulatorGui(player, simulator).open();
             return;
         }
 
-        if (rayTraceResult.getHitEntity() != null) {
-            REntity hitEntity = rayTraceResult.getHitEntity();
-            Vector vector = new Vector(hitEntity.getX(), hitEntity.getY(), hitEntity.getZ());
-            List<SimulatorElement<?>> elements = simulator.getGroups().stream().map(SimulatorGroup::getElements).flatMap(List::stream).filter(element -> {
-                return element.getWorldPos().distanceSquared(vector) < (1 / 16.0) * (1 / 16.0);
-            }).collect(Collectors.toList());
-
-            switch (elements.size()) {
-                case 0:
-                    return;
-                case 1:
-                    // Open single element present in Simulator
-                    SimulatorElement<?> element = elements.get(0);
-                    SimulatorGroup group1 = element.getGroup(simulator);
-                    SimulatorBaseGui back = new SimulatorGui(player, simulator);
-                    if (group1.getElements().size() > 1) {
-                        back = new SimulatorGroupGui(player, simulator, group1, back);
-                    }
-                    element.open(player, simulator, group1, back);
-                    break;
-                default:
-                    List<SimulatorGroup> parents = elements.stream().map(e -> e.getGroup(simulator)).distinct().collect(Collectors.toList());
-                    if (parents.size() == 1) {
-                        // Open multi element present in Simulator in existing group
-                        SimulatorGui simulatorGui = new SimulatorGui(player, simulator);
-                        new SimulatorGroupGui(player, simulator, parents.get(0), simulatorGui).open();
-                    } else {
-                        // Open multi element present in Simulator in implicit group
-                        SimulatorGroup group2 = new SimulatorGroup();
-                        group2.setMaterial(null);
-                        group2.getElements().addAll(elements);
-                        SimulatorGui simulatorGui = new SimulatorGui(player, simulator);
-                        new SimulatorGroupGui(player, simulator, group2, simulatorGui).open();
-                    }
-                    break;
-            }
+        if (hitEntity.isPresent()) {
+            openElement(player, simulator, hitEntity.get());
             return;
         }
 
-        // Add new Element to current simulator
-        createElement(player, rayTraceResult, simulator);
+        createElement(player, cursorLocation, simulator);
     }
 
-    private void createElement(Player player, RayTraceUtils.RRayTraceResult rayTraceResult, Simulator simulator) {
+    private static void openElement(Player player, Simulator simulator, REntity hitEntity) {
+        Vector vector = new Vector(hitEntity.getX(), hitEntity.getY(), hitEntity.getZ());
+        List<SimulatorElement<?>> elements = simulator.getGroups().stream().map(SimulatorGroup::getElements).flatMap(List::stream).filter(element -> {
+            return element.getWorldPos().distanceSquared(vector) < (1 / 16.0) * (1 / 16.0);
+        }).collect(Collectors.toList());
+
+        switch (elements.size()) {
+            case 0:
+                return;
+            case 1:
+                SimulatorElement<?> element = elements.get(0);
+                SimulatorGroup group1 = element.getGroup(simulator);
+                SimulatorBaseGui back = new SimulatorGui(player, simulator);
+                if (group1.getElements().size() > 1) {
+                    back = new SimulatorGroupGui(player, simulator, group1, back);
+                }
+                element.open(player, simulator, group1, back);
+                break;
+            default:
+                List<SimulatorGroup> parents = elements.stream().map(e -> e.getGroup(simulator)).distinct().collect(Collectors.toList());
+                if (parents.size() == 1) {
+                    SimulatorGui simulatorGui = new SimulatorGui(player, simulator);
+                    new SimulatorGroupGui(player, simulator, parents.get(0), simulatorGui).open();
+                } else {
+                    SimulatorGroup group2 = new SimulatorGroup();
+                    group2.setMaterial(null);
+                    group2.getElements().addAll(elements);
+                    SimulatorGui simulatorGui = new SimulatorGui(player, simulator);
+                    new SimulatorGroupGui(player, simulator, group2, simulatorGui).open();
+                }
+                break;
+        }
+    }
+
+    private static void createElement(Player player, Location cursorLocation, Simulator simulator) {
         CursorType type = cursorType.getOrDefault(player, CursorType.TNT);
-        Vector vector = type.position.apply(player, rayTraceResult);
+        Vector vector = cursorLocation.toVector();
         if (type == CursorType.REDSTONE_BLOCK) {
             vector.subtract(new Vector(0.5, 0, 0.5));
         }

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorWatcher.java

@@ -124,4 +124,11 @@ public class SimulatorWatcher {
         }
         return entityServer.getEntities();
     }
+
+    synchronized REntityServer getEntityServerOfSimulator(Simulator simulator) {
+        if (simulator == null) {
+            return null;
+        }
+        return entityServers.computeIfAbsent(simulator, __ -> createSim(new REntityServer(), simulator));
+    }
 }

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/slaves/blastresistance/BlastResistanceCommand.java

@@ -0,0 +1,73 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.slaves.blastresistance;
+
+import com.google.common.util.concurrent.AtomicDouble;
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.extent.clipboard.Clipboard;
+import com.sk89q.worldedit.world.block.BlockState;
+import de.steamwar.bausystem.BauSystem;
+import de.steamwar.command.SWCommand;
+import de.steamwar.linkage.Linked;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Linked
+public class BlastResistanceCommand extends SWCommand {
+
+    public BlastResistanceCommand() {
+        super("blastresistance");
+    }
+
+    @Register(description = "BLASTRESISTANCE_HELP")
+    public void command(@Validator Player player) {
+        LocalSession localSession = WorldEdit.getInstance().getSessionManager().get(BukkitAdapter.adapt(player));
+        Clipboard clipboard;
+        try {
+            clipboard = localSession.getClipboard().getClipboards().getFirst();
+        } catch (WorldEditException e) {
+            BauSystem.MESSAGE.send("BLASTRESISTANCE_NO_CLIPBOARD", player);
+            return;
+        }
+
+        AtomicDouble min = new AtomicDouble(0);
+        AtomicDouble max = new AtomicDouble(0);
+        AtomicDouble sum = new AtomicDouble(0);
+        AtomicInteger count = new AtomicInteger(0);
+        clipboard.forEach(blockVector3 -> {
+            BlockState blockState = clipboard.getBlock(blockVector3);
+            Material material = BukkitAdapter.adapt(blockState).getMaterial();
+            if (material == Material.WATER || material == Material.LAVA) return;
+            double blastResistance = BukkitAdapter.adapt(blockState).getMaterial().getBlastResistance();
+            min.set(Math.min(min.get(), blastResistance));
+            max.set(Math.max(max.get(), blastResistance));
+            sum.addAndGet(blastResistance);
+            count.getAndIncrement();
+        });
+
+        BauSystem.MESSAGE.send("BLASTRESISTANCE_RESULT", player, min.get(), max.get(), sum.get() / count.get());
+    }
+}

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Trace.java

@@ -25,6 +25,7 @@ import de.steamwar.bausystem.features.tracer.rendering.TraceEntity;
 import de.steamwar.bausystem.features.tracer.rendering.ViewFlag;
 import de.steamwar.bausystem.region.Region;
 import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityAction;
 import de.steamwar.entity.REntityServer;
 import lombok.Getter;
 import lombok.Setter;
@@ -143,14 +144,6 @@ public class Trace {
         } else {
             entityServer = new REntityServer();
             entityServer.addPlayer(player);
-            entityServer.setCallback((p, rEntity, entityAction) -> {
-                if (entityAction != REntityServer.EntityAction.INTERACT) {
-                    return;
-                }
-                if (rEntity instanceof TraceEntity) {
-                    ((TraceEntity) rEntity).printIntoChat(p);
-                }
-            });
             entityServerMap.put(player, entityServer);
         }
         render(getRecords(), entityServer, playerTraceShowData);
@@ -167,14 +160,6 @@ public class Trace {
         REntityServer entityServer = entityServerMap.computeIfAbsent(player, k -> {
             REntityServer newEntityServer = new REntityServer();
             newEntityServer.addPlayer(k);
-            newEntityServer.setCallback((p, rEntity, entityAction) -> {
-                if (entityAction != REntityServer.EntityAction.INTERACT) {
-                    return;
-                }
-                if (rEntity instanceof TraceEntity) {
-                    ((TraceEntity) rEntity).printIntoChat(p);
-                }
-            });
             return newEntityServer;
         });
 

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/rendering/TraceEntity.java

@@ -25,7 +25,9 @@ import de.steamwar.bausystem.features.tracer.TNTPoint;
 import de.steamwar.bausystem.features.tracer.Trace;
 import de.steamwar.bausystem.features.tracer.TraceManager;
 import de.steamwar.entity.RBlockDisplay;
+import de.steamwar.entity.REntityAction;
 import de.steamwar.entity.REntityServer;
+import de.steamwar.entity.RInteraction;
 import lombok.Getter;
 import net.md_5.bungee.api.chat.ClickEvent;
 import org.bukkit.Location;
@@ -67,6 +69,7 @@ public class TraceEntity extends RBlockDisplay {
     private final String uniqueTntIdsString;
 
     private final Trace trace;
+    private final RInteraction hitbox;
 
     public TraceEntity(REntityServer server, Location location, boolean isExplosion, List<TNTPoint> records, Trace trace) {
         super(server, location);
@@ -74,8 +77,23 @@ public class TraceEntity extends RBlockDisplay {
         this.records = records;
         this.trace = trace;
         uniqueTntIdsString = records.stream().map(TNTPoint::getTntId).distinct().map(Object::toString).collect(Collectors.joining(" "));
+        hitbox = new RInteraction(server, location);
+        hitbox.setInteractionHeight(TNT_VISUAL_SCALE);
+        hitbox.setInteractionWidth(TNT_VISUAL_SCALE);
+        hitbox.setCallback((player, action) -> {
+            if (action == REntityAction.INTERACT) {
+                printIntoChat(player);
+            }
+        });
         setTransform(TNT_VISUAL_TRANSFORM);
         setBlock(material.createBlockData());
+
+    }
+
+    @Override
+    public void die() {
+        hitbox.die();
+        super.die();
     }
 
     /**

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/rendering/ViewFlag.java

@@ -20,8 +20,8 @@
 package de.steamwar.bausystem.features.tracer.rendering;
 
 import de.steamwar.bausystem.features.tracer.TNTPoint;
+import de.steamwar.entity.RBlockDisplay;
 import de.steamwar.entity.REntityServer;
-import de.steamwar.entity.RFallingBlockEntity;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.util.Vector;
@@ -129,8 +129,8 @@ public abstract class ViewFlag {
 
                 Location yLocation = previous.getLocation().clone().add(0, delta.getY(), 0);
                 if (yLocation.distanceSquared(representative.getLocation()) >= 1.0 / 256.0 && yLocation.distanceSquared(previous.getLocation()) >= 1.0 / 256.0) {
-                    RFallingBlockEntity y = new RFallingBlockEntity(server, yLocation, Material.WHITE_STAINED_GLASS);
-                    y.setNoGravity(true);
+                    RBlockDisplay y = new RBlockDisplay(server, yLocation);
+                    y.setBlock(Material.WHITE_STAINED_GLASS.createBlockData());
                 }
 
                 Location secoundLocation;
@@ -141,8 +141,8 @@ public abstract class ViewFlag {
                 }
 
                 if (secoundLocation.distanceSquared(representative.getLocation()) >= 1.0 / 256.0 && secoundLocation.distanceSquared(previous.getLocation()) >= 1.0 / 256.0) {
-                    RFallingBlockEntity second = new RFallingBlockEntity(server, secoundLocation, Material.WHITE_STAINED_GLASS);
-                    second.setNoGravity(true);
+                    RBlockDisplay second = new RBlockDisplay(server, secoundLocation);
+                    second.setBlock(Material.WHITE_STAINED_GLASS.createBlockData());
                 }
             }
         }

BauSystem/build.gradle.kts

@@ -37,5 +37,6 @@ tasks.register<DevServer>("DevBau21") {
     dependsOn(":SpigotCore:shadowJar")
     dependsOn(":BauSystem:shadowJar")
     dependsOn(":SchematicSystem:shadowJar")
+    dependsOn(":KotlinCore:shadowJar")
     template = "Bau21"
 }

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/listener/ArrowStopper.java

@@ -46,6 +46,7 @@ public class ArrowStopper {
     private void run() {
         Recording.iterateOverEntities(AbstractArrow.class::isInstance, entity -> {
             Projectile arrow = (Projectile) entity;
+            if(!(arrow.getShooter() instanceof Player)) return;
             if (invalidEntity(arrow)) return;
 
             Location prevLocation = arrow.getLocation().toVector().subtract(arrow.getVelocity()).toLocation(arrow.getWorld());

KotlinCore/build.gradle.kts

@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 /*
  *   This file is a part of the SteamWar software.
  *
@@ -41,3 +43,8 @@ dependencies {
     implementation(libs.mysql)
     implementation("org.slf4j:slf4j-simple:2.0.17")
 }
+val compileKotlin: KotlinCompile by tasks
+
+compileKotlin.compilerOptions {
+    freeCompilerArgs.set(listOf("-XXLanguage:+ContextParameters"))
+}

KotlinCore/src/de/steamwar/kotlin/ui/Observer.kt

@@ -0,0 +1,82 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+import kotlin.properties.ReadOnlyProperty
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+abstract class Observable<T> {
+    private val listeners = mutableSetOf<ObserverListener>()
+
+    fun removeListener(render: ObserverListener) {
+        listeners.remove(render)
+    }
+
+    internal fun notifyListeners() {
+        listeners.forEach { it.update() }
+    }
+
+    context(render: ObserverListener)
+    fun listen(): Observable<T> {
+        listeners.add(render)
+        render.observers.add(this)
+        return this
+    }
+
+    fun listen(callback: (T) -> Unit): () -> Unit {
+        val listener = object: ObserverListener() {
+            override fun update() = callback(get())
+        }
+        listeners.add(listener)
+        return { removeListener(listener) }
+    }
+
+    abstract fun get(): T
+
+    fun <R> map(mapper: (T) -> R): ReadOnlyProperty<Any?, R> = Delegate(mapper(get()))
+
+    class Delegate<T>(val value: T): ReadOnlyProperty<Any?, T> {
+        override fun getValue(thisRef: Any?, property: KProperty<*>): T = value
+    }
+}
+
+class Observer<T>(private var value: T): ReadWriteProperty<Any?, T>, Observable<T>() {
+    override fun getValue(thisRef: Any?, property: KProperty<*>): T {
+        return value
+    }
+
+    override fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
+        this.value = value
+        notifyListeners()
+    }
+
+    fun set(value: T) {
+        this.value = value
+        notifyListeners()
+    }
+
+    override fun get() = value
+
+    fun update(update: (T) -> T) {
+        this.value = update(value)
+        notifyListeners()
+    }
+}

KotlinCore/src/de/steamwar/kotlin/ui/ObserverListener.kt

@@ -0,0 +1,31 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+abstract class ObserverListener {
+    val observers = mutableSetOf<Observable<*>>()
+
+    abstract fun update()
+
+    open fun destroy() {
+        observers.forEach { it.removeListener(this) }
+        observers.clear()
+    }
+}

KotlinCore/src/de/steamwar/kotlin/ui/RenderMarker.kt

@@ -0,0 +1,23 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+@DslMarker
+annotation class RenderMarker()

KotlinCore/src/de/steamwar/kotlin/ui/RenderObject.kt

@@ -0,0 +1,26 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+interface RenderObject {
+    fun destroy()
+
+    fun render()
+}

KotlinCore/src/de/steamwar/kotlin/ui/UIInventory.kt

@@ -0,0 +1,53 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+import de.steamwar.kotlin.ui.context.WindowContext
+import org.bukkit.entity.Player
+import org.bukkit.event.inventory.InventoryType
+
+abstract class UIInventory(val player: Player): ObserverListener() {
+    var window: UIWindow? = null
+
+    abstract fun view()
+
+    fun open() {
+        if (window == null) {
+            view()
+            assert(window != null) { "View method must create a inventory" }
+        }
+
+        window!!.open()
+    }
+
+    fun render() {
+        window?.onClose()
+        window = null
+        open()
+    }
+
+    protected fun inventory(size: Int, title: String, init: WindowContext.() -> Unit) {
+        window = UIWindow(size, title, player, init)
+    }
+
+    protected fun inventory(type: InventoryType, title: String, init: WindowContext.() -> Unit) {
+        window = UIWindow(type, title, player, init)
+    }
+}

KotlinCore/src/de/steamwar/kotlin/ui/UIWindow.kt

@@ -0,0 +1,91 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui
+
+import de.steamwar.kotlin.KotlinCore
+import de.steamwar.kotlin.ui.context.WindowContext
+import net.kyori.adventure.text.Component
+import org.bukkit.Bukkit
+import org.bukkit.entity.Player
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.inventory.ClickType
+import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.event.inventory.InventoryCloseEvent
+import org.bukkit.event.inventory.InventoryType
+import org.bukkit.inventory.Inventory
+import org.bukkit.inventory.InventoryHolder
+import org.bukkit.inventory.InventoryView
+
+class UIWindow(val player: Player, val render: WindowContext.() -> Unit): InventoryHolder {
+    val onClicks = mutableMapOf<Int, (event: InventoryClickEvent) -> Unit>()
+    private var updating = false
+    lateinit var bukkitInv: Inventory
+        private set
+    val context by lazy { WindowContext(this) }
+
+    constructor(size: Int, title: String, player: Player, render: WindowContext.() -> Unit): this(player, render) {
+        bukkitInv = KotlinCore.plugin.server.createInventory(this, size * 9, Component.translatable(title))
+    }
+
+    constructor(type: InventoryType, title: String, player: Player, render: WindowContext.() -> Unit): this(player, render) {
+        assert(type != InventoryType.CHEST) { "Chest inventories should use the constructor with size" }
+        bukkitInv = KotlinCore.plugin.server.createInventory(this, type, Component.translatable(title))
+    }
+
+    fun open() {
+        render(context)
+        player.openInventory(bukkitInv)
+    }
+
+    fun onClose() {
+        if (updating) return
+
+        onClicks.clear()
+        context.destroy()
+    }
+
+    override fun getInventory() = bukkitInv
+
+    companion object : Listener {
+        init {
+            Bukkit.getPluginManager().registerEvents(this, KotlinCore.plugin)
+        }
+
+        @EventHandler
+        fun onInventoryClick(event: InventoryClickEvent) {
+            val window = event.inventory.holder
+            if (window is UIWindow) {
+                event.isCancelled = true
+
+                if (window.context.skipDoubleClick && event.click == ClickType.DOUBLE_CLICK) return
+                window.onClicks[event.slot]?.invoke(event)
+            }
+        }
+
+        @EventHandler
+        fun onInventoryClose(event: InventoryCloseEvent) {
+            val window = event.inventory.holder
+            if (window is UIWindow) {
+                window.onClose()
+            }
+        }
+    }
+}

KotlinCore/src/de/steamwar/kotlin/ui/components/ItemContext.kt

@@ -0,0 +1,65 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui.components
+
+import de.steamwar.kotlin.ui.ObserverListener
+import de.steamwar.kotlin.ui.RenderMarker
+import de.steamwar.kotlin.ui.RenderObject
+import de.steamwar.kotlin.ui.context.GroupContext
+import de.steamwar.kotlin.ui.context.RenderParent
+import org.bukkit.Material
+import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.inventory.ItemStack
+
+@RenderMarker
+class ItemContext(val parent: RenderParent, val renderFunc: ItemContext.() -> Unit): RenderObject, ObserverListener() {
+    override fun update() {
+        val oldX = x
+        val oldY = y
+        render()
+        if (oldX != x || oldY != y) {
+            parent.resetSlot(oldX, oldY)
+        }
+    }
+
+    override fun destroy() {
+        parent.resetSlot(x, y)
+    }
+
+    override fun render() {
+        renderFunc(this)
+        parent.renderItem(x, y, item, onClick)
+    }
+
+    init {
+        render()
+    }
+
+    var item: ItemStack = ItemStack.of(Material.AIR)
+    var onClick: (event: InventoryClickEvent) -> Unit = {}
+    var x: Int = 0
+    var y: Int = 0
+
+    fun onClick(func: (event: InventoryClickEvent) -> Unit) {
+        onClick = func
+    }
+}
+
+fun GroupContext.item(init: ItemContext.() -> Unit) = children.add(ItemContext(this, init))

KotlinCore/src/de/steamwar/kotlin/ui/context/GroupContext.kt

@@ -0,0 +1,65 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui.context
+
+import de.steamwar.kotlin.ui.ObserverListener
+import de.steamwar.kotlin.ui.RenderMarker
+import de.steamwar.kotlin.ui.RenderObject
+import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.inventory.ItemStack
+
+@RenderMarker
+open class GroupContext(val parent: RenderParent?, val init: GroupContext.() -> Unit): ObserverListener(), RenderObject, RenderParent {
+    val children = mutableListOf<RenderObject>()
+    val updatedSlots = mutableSetOf<Pair<Int, Int>>()
+
+    override fun update() = render()
+
+    override fun destroy() {
+        children.forEach { it.destroy() }
+        super.destroy()
+    }
+
+    init {
+        init(this)
+    }
+
+    override fun renderItem(x: Int, y: Int, item: ItemStack, onClick: (event: InventoryClickEvent) -> Unit) {
+        updatedSlots.add(x to y)
+        parent?.renderItem(x, y, item, onClick)
+    }
+
+    override fun resetSlot(x: Int, y: Int) {
+        parent?.resetSlot(x, y)
+    }
+
+    fun group(init: GroupContext.() -> Unit) {
+        children.add(GroupContext(this, init))
+    }
+
+    override fun render() {
+        children.forEach { it.destroy() }
+        children.clear()
+        val oldUpdatedSlots = updatedSlots.toList()
+        updatedSlots.clear()
+        init(this)
+        (oldUpdatedSlots - updatedSlots).forEach { resetSlot(it.first, it.second) }
+    }
+}

KotlinCore/src/de/steamwar/kotlin/ui/context/RenderParent.kt

@@ -0,0 +1,29 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui.context
+
+import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.inventory.ItemStack
+
+interface RenderParent {
+    fun renderItem(x: Int, y: Int, item: ItemStack, onClick: (event: InventoryClickEvent) -> Unit)
+
+    fun resetSlot(x: Int, y: Int)
+}

KotlinCore/src/de/steamwar/kotlin/ui/context/WindowContext.kt

@@ -0,0 +1,54 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.ui.context
+
+import de.steamwar.kotlin.ui.RenderMarker
+import de.steamwar.kotlin.ui.UIWindow
+import org.bukkit.Material
+import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.event.inventory.InventoryType
+import org.bukkit.inventory.ItemStack
+
+@RenderMarker
+class WindowContext(val window: UIWindow): GroupContext(null, {}) {
+    override fun renderItem(x: Int, y: Int, item: ItemStack, onClick: (event: InventoryClickEvent) -> Unit) {
+        val slot = calculateSlot(x, y)
+        window.bukkitInv.setItem(slot, item)
+        window.onClicks[slot] = onClick
+    }
+
+    override fun resetSlot(x: Int, y: Int) {
+        val slot = calculateSlot(x, y)
+        window.bukkitInv.setItem(slot, ItemStack.of(Material.AIR))
+        window.onClicks.remove(slot)
+    }
+
+    private fun calculateSlot(x: Int, y: Int) = when (window.inventory.type) {
+        InventoryType.DROPPER, InventoryType.DISPENSER -> x + y * 3
+        InventoryType.HOPPER -> x
+        else -> x + y * 9
+    }
+
+    fun outsideClick(click: (event: InventoryClickEvent) -> Unit) {
+        window.onClicks[-999] = click
+    }
+
+    var skipDoubleClick = true
+}

KotlinCore/src/de/steamwar/kotlin/util/ItemUtils.kt

@@ -0,0 +1,50 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.kotlin.util
+
+import net.kyori.adventure.text.Component
+import org.bukkit.Bukkit
+import org.bukkit.Material
+import org.bukkit.enchantments.Enchantment
+import org.bukkit.inventory.ItemFlag
+import org.bukkit.inventory.ItemStack
+import org.bukkit.inventory.meta.SkullMeta
+import org.bukkit.inventory.meta.components.CustomModelDataComponent
+
+fun ItemStack.count(count: Int) = apply { amount = count }
+
+fun ItemStack.name(name: Component) = apply { itemMeta = itemMeta.also { it.displayName(name) } }
+
+fun ItemStack.lored(lore: List<Component>) = apply { itemMeta = itemMeta.also { it.lore(lore) } }
+
+fun String.asMaterial(): Material = Material.matchMaterial(this) ?: Material.BARRIER
+
+fun skull(owner: String): ItemStack = ItemStack(Material.PLAYER_HEAD)
+    .also {
+        it.editMeta(SkullMeta::class.java) {
+            it.playerProfile = Bukkit.getOfflinePlayer(owner.trimStart('.')).playerProfile.also { pp -> pp.complete() }
+        }
+    }
+
+fun ItemStack.hideAttributes() = apply { itemMeta = itemMeta.also { it.addItemFlags(*ItemFlag.entries.toTypedArray()) } }
+
+fun ItemStack.enchanted() = apply { itemMeta = itemMeta.also { it.addEnchant(Enchantment.UNBREAKING, 10, true) } }
+
+fun ItemStack.customModelData(model: CustomModelDataComponent) = apply { itemMeta = itemMeta.also { it.setCustomModelDataComponent(model) } }

LobbySystem/src/de/steamwar/lobby/boatrace/BoatRace.java

@@ -20,7 +20,9 @@
 package de.steamwar.lobby.boatrace;
 
 import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityAction;
 import de.steamwar.entity.REntityServer;
+import de.steamwar.entity.RInteraction;
 import de.steamwar.lobby.LobbySystem;
 import de.steamwar.lobby.util.LeaderboardManager;
 import de.steamwar.sql.SteamwarUser;
@@ -58,11 +60,12 @@ public class BoatRace implements EventListener, Listener {
 
     static {
         boatNpcServer = new REntityServer();
-        REntity starter = new REntity(boatNpcServer, EntityType.VILLAGER, BoatRacePositions.NPC);
-        boatNpcServer.setCallback((player, rEntity, entityAction) -> {
-            if (rEntity != starter) return;
-            Bukkit.getWorlds().get(0).getEntities().stream().filter(entity -> entity.getType() == EntityType.END_CRYSTAL).forEach(Entity::remove);
-            if (entityAction == REntityServer.EntityAction.INTERACT && !oneNotStarted) {
+        new REntity(boatNpcServer, EntityType.VILLAGER, BoatRacePositions.NPC);
+        RInteraction interaction = new RInteraction(boatNpcServer, BoatRacePositions.NPC.clone().subtract(0.5, 0, 0.5));
+        interaction.setInteractionHeight(1.95f);
+        interaction.setCallback((player, entity, action) -> {
+            Bukkit.getWorlds().get(0).getEntities().stream().filter(e -> e.getType() == EntityType.END_CRYSTAL).forEach(Entity::remove);
+            if (action == REntityAction.INTERACT && !oneNotStarted) {
                 oneNotStarted = true;
                 new BoatRace(player);
             }

SpigotCore/SpigotCore_Main/src/de/steamwar/cursor/Cursor.java

@@ -0,0 +1,240 @@
+package de.steamwar.cursor;
+
+import de.steamwar.core.SWPlayer;
+import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityServer;
+import de.steamwar.entity.RFallingBlockEntity;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.World;
+import org.bukkit.block.BlockFace;
+import org.bukkit.entity.Player;
+import org.bukkit.event.block.Action;
+import org.bukkit.util.Vector;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Predicate;
+
+@Getter
+public class Cursor implements SWPlayer.Component {
+    private final World WORLD = Bukkit.getWorlds().get(0);
+
+    private final REntityServer targetServer;
+    private final Player owner;
+
+    private final AtomicBoolean isRendering = new AtomicBoolean(false);
+
+    private RFallingBlockEntity cursorEntity;
+    private final REntityServer cursorServer;
+    private Location cursorLocation;
+    private REntity hitEntity;
+
+    @Setter
+    private Material cursorMaterial;
+    @Setter
+    private List<CursorMode> allowedCursorModes;
+    private final Material highlightMaterial;
+    private final ClickHandler onClick;
+    private final BiConsumer<Location, Optional<REntity>> onRender;
+
+
+    public Cursor(REntityServer targetServer, Player owner, Material highlightMaterial, Material cursorMaterial, List<CursorMode> allowedModes, ClickHandler onClick) {
+        this(targetServer, owner, highlightMaterial, cursorMaterial, allowedModes, onClick, (location, hitEntity) -> {
+        });
+    }
+
+    public Cursor(REntityServer targetServer, Player owner, Material highlightMaterial, Material cursorMaterial, List<CursorMode> allowedModes, ClickHandler onClick, BiConsumer<Location, Optional<REntity>> onRender) {
+        this.targetServer = targetServer;
+        this.owner = owner;
+        this.highlightMaterial = highlightMaterial;
+        this.cursorMaterial = cursorMaterial;
+        this.allowedCursorModes = allowedModes;
+        this.onClick = onClick;
+        this.onRender = onRender;
+
+        cursorServer = new REntityServer();
+        cursorServer.addPlayer(owner);
+
+        SWPlayer.of(owner).setComponent(this);
+    }
+
+    public void renderDeduplicated() {
+        if (!isRendering.getAndSet(true)) {
+            render();
+            isRendering.set(false);
+        }
+    }
+
+    private void render() {
+        RayTraceUtils.RRayTraceResult rayTraceResult = RayTraceUtils.traceREntity(owner, owner.getLocation(), targetServer.getEntities());
+        if (rayTraceResult == null) {
+            if (cursorEntity != null)
+                cursorEntity.die();
+            cursorEntity = null;
+            cursorLocation = null;
+            hitEntity = null;
+            onRender.accept(null, Optional.empty());
+            return;
+        }
+
+        REntity hitEntity = rayTraceResult.getHitEntity() == cursorEntity ? null : rayTraceResult.getHitEntity();
+
+
+        Material activeCursorMaterial = hitEntity == null ? cursorMaterial : highlightMaterial;
+        CursorMode activeCursorMode = allowedCursorModes.stream().filter((mode) -> mode.isActive.test(owner)).min(Comparator.comparingInt(a -> a.priority))
+                .orElse(CursorMode.BLOCK_ALIGNED);
+
+        Location activeCursorLocation = hitEntity == null ? activeCursorMode.positionTransform.apply(owner, rayTraceResult).toLocation(WORLD)
+                : new Vector(hitEntity.getX(), hitEntity.getY(), hitEntity.getZ()).toLocation(WORLD);
+
+        cursorLocation = activeCursorLocation;
+        this.hitEntity = hitEntity;
+
+        if (cursorEntity == null) {
+            cursorEntity = new RFallingBlockEntity(cursorServer, activeCursorLocation, activeCursorMaterial);
+            cursorEntity.setNoGravity(true);
+        } else if (cursorEntity.getMaterial() == activeCursorMaterial) {
+            cursorEntity.move(activeCursorLocation);
+        } else {
+            cursorEntity.die();
+            cursorEntity = new RFallingBlockEntity(cursorServer, activeCursorLocation, activeCursorMaterial);
+            cursorEntity.setNoGravity(true);
+            if (activeCursorMaterial == highlightMaterial) {
+                cursorEntity.setGlowing(true);
+            }
+        }
+        onRender.accept(cursorLocation, Optional.ofNullable(hitEntity));
+    }
+
+    protected void handlePlayerClick(Action clickAction) {
+        renderDeduplicated();
+        onClick.onClick(this.cursorLocation, Optional.ofNullable(this.hitEntity), clickAction);
+    }
+
+    @Override
+    public void onUnmount(SWPlayer player) {
+        cursorServer.close();
+    }
+
+    @AllArgsConstructor
+    public enum CursorMode {
+        FREE(1, (player, rayTraceResult) -> {
+            Vector pos = rayTraceResult.getHitPosition();
+
+            BlockFace face = rayTraceResult.getHitBlockFace();
+            if (face != null) {
+                switch (face) {
+                    case DOWN:
+                        pos.setY(pos.getY() - 0.98);
+                        break;
+                    case EAST:
+                        pos.setX(pos.getX() + 0.49);
+                        break;
+                    case WEST:
+                        pos.setX(pos.getX() - 0.49);
+                        break;
+                    case NORTH:
+                        pos.setZ(pos.getZ() - 0.49);
+                        break;
+                    case SOUTH:
+                        pos.setZ(pos.getZ() + 0.49);
+                        break;
+                    default:
+                        break;
+                }
+
+                if (face.getModY() == 0 && player.isSneaking()) {
+                    pos.setY(pos.getY() - 0.49);
+                }
+            }
+
+            return pos;
+        }, Player::isSneaking),
+
+        SURFACE_ALIGNED(2, (player, rayTraceResult) -> {
+            Vector hitPosition = rayTraceResult.getHitPosition().clone();
+            Vector pos = blockAlignedPosition(rayTraceResult);
+            BlockFace face = rayTraceResult.getHitBlockFace();
+
+            if (face != null && face != BlockFace.SELF) {
+                switch (face) {
+                    case UP:
+                        pos.setY(hitPosition.getY());
+                        break;
+                    case DOWN:
+                        pos.setY(hitPosition.getY() + face.getModY());
+                        break;
+                    case EAST:
+                    case WEST:
+                        pos.setX(hitPosition.getX() + face.getModX() * 0.5);
+                        break;
+                    case NORTH:
+                    case SOUTH:
+                        pos.setZ(hitPosition.getZ() + face.getModZ() * 0.5);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            return pos;
+        }, (player) -> true),
+
+        BLOCK_ALIGNED(0, (player, rayTraceResult) -> blockAlignedPosition(rayTraceResult), (player) -> true);
+
+
+        private final int priority;
+        private final BiFunction<Player, RayTraceUtils.RRayTraceResult, Vector> positionTransform;
+        private final Predicate<Player> isActive;
+
+        private static Vector blockAlignedPosition(RayTraceUtils.RRayTraceResult rayTraceResult) {
+            Vector pos = rayTraceResult.getHitPosition();
+
+            BlockFace face = rayTraceResult.getHitBlockFace();
+            if (face != null) {
+                switch (face) {
+                    case DOWN:
+                        pos.setY(pos.getY() - 0.98);
+                        break;
+                    case EAST:
+                        pos.setX(pos.getX() + 0.49);
+                        break;
+                    case WEST:
+                        pos.setX(pos.getX() - 0.49);
+                        break;
+                    case NORTH:
+                        pos.setZ(pos.getZ() - 0.49);
+                        break;
+                    case SOUTH:
+                        pos.setZ(pos.getZ() + 0.49);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            pos.setX(pos.getBlockX() + 0.5);
+            if (pos.getY() - pos.getBlockY() != 0 && face == BlockFace.UP) {
+                pos.setY(pos.getBlockY() + 1.0);
+            } else {
+                pos.setY(pos.getBlockY());
+            }
+            pos.setZ(pos.getBlockZ() + 0.5);
+            return pos;
+        }
+    }
+
+    @FunctionalInterface
+    public interface ClickHandler {
+        void onClick(Location location, Optional<REntity> hitEntity, Action action);
+    }
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/cursor/CursorListener.java

@@ -0,0 +1,56 @@
+package de.steamwar.cursor;
+
+import com.comphenix.tinyprotocol.TinyProtocol;
+import de.steamwar.core.Core;
+import de.steamwar.core.SWPlayer;
+import de.steamwar.linkage.Linked;
+import lombok.Getter;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ServerboundMovePlayerPacket;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerInteractEvent;
+
+import java.util.*;
+
+
+@Linked
+public class CursorListener implements Listener {
+    @Getter
+    private static CursorListener instance;
+
+    public CursorListener() {
+        if (instance == null) {
+            instance = this;
+        }
+
+        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.Pos.class, this::updateCursorFromPacket);
+        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.Rot.class, this::updateCursorFromPacket);
+        TinyProtocol.instance.addFilter(ServerboundMovePlayerPacket.PosRot.class, this::updateCursorFromPacket);
+
+        Bukkit.getScheduler().runTaskTimer(Core.getInstance(), () -> {
+            SWPlayer.allWithSingleComponent(Cursor.class)
+                    .map(SWPlayer.SWPlayerWithComponent::getComponent)
+                    .forEach(Cursor::renderDeduplicated);
+        }, 1, 1);
+    }
+
+    public Packet<?> updateCursorFromPacket(Player player, Packet<?> packet) {
+        SWPlayer swPlayer = SWPlayer.of(player);
+        Optional<Cursor> activeCursor = swPlayer.getComponent(Cursor.class);
+
+        activeCursor.ifPresent(Cursor::renderDeduplicated);
+
+        return packet;
+    }
+
+    @EventHandler
+    public void onPlayerInteract(PlayerInteractEvent event) {
+        SWPlayer.of(event.getPlayer()).getComponent(Cursor.class).ifPresent(cursor -> {
+            event.setCancelled(true);
+            cursor.handlePlayerClick(event.getAction());
+        });
+    }
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/cursor/RayTraceUtils.java

@@ -1,7 +1,7 @@
 /*
  *   This file is a part of the SteamWar software.
  *
- *   Copyright (C) 2025 SteamWar.de-Serverteam
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU Affero General Public License as published by
@@ -17,7 +17,7 @@
  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package de.steamwar.bausystem.utils;
+package de.steamwar.cursor;
 
 import de.steamwar.entity.REntity;
 import lombok.Data;

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RArmorStand.java

@@ -20,6 +20,7 @@
 package de.steamwar.entity;
 
 import lombok.Getter;
+import lombok.Setter;
 import net.minecraft.network.syncher.EntityDataAccessor;
 import net.minecraft.network.syncher.EntityDataSerializers;
 import org.bukkit.Location;
@@ -27,13 +28,16 @@ import org.bukkit.entity.EntityType;
 
 import java.util.function.Consumer;
 
-public class RArmorStand extends REntity {
+@Getter
+public class RArmorStand extends REntity implements RInteractableEntity<RArmorStand> {
 
     private static final EntityDataAccessor<Byte> sizeWatcher = new EntityDataAccessor<>(15, EntityDataSerializers.BYTE);
 
-    @Getter
     private final Size size;
 
+    @Setter
+    private REntityActionListener<RArmorStand> callback = null;
+
     public RArmorStand(REntityServer server, Location location, Size size) {
         super(server, EntityType.ARMOR_STAND, location, 0);
         this.size = size;

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/REntityAction.java

@@ -0,0 +1,25 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.entity;
+
+public enum REntityAction {
+    INTERACT,
+    ATTACK,
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/REntityActionListener.java

@@ -0,0 +1,26 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.entity;
+
+import org.bukkit.entity.Player;
+
+public interface REntityActionListener<E extends REntity> {
+    void onAction(Player player, E entity, REntityAction action);
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/REntityServer.java

@@ -51,7 +51,6 @@ public class REntityServer implements Listener {
     private final HashMap<Player, Location> lastLocation = new HashMap<>();
     private final HashMap<Player, Integer> viewDistance = new HashMap<>();
 
-    private EntityActionListener callback = null;
     private final Set<Player> playersThatClicked = Collections.synchronizedSet(new HashSet<>());
 
     private final BiFunction<Player, ServerboundInteractPacket, Object> filter = (player, packet) -> {
@@ -61,25 +60,19 @@ public class REntityServer implements Listener {
         if (playersThatClicked.contains(player)) return null;
 
         playersThatClicked.add(player);
-        EntityAction action = packet.isAttack() ? EntityAction.ATTACK : EntityAction.INTERACT;
+        REntityAction action = packet.isAttack() ? REntityAction.ATTACK : REntityAction.INTERACT;
         Bukkit.getScheduler().runTask(Core.getInstance(), () -> {
             playersThatClicked.remove(player);
-            callback.onAction(player, entity, action);
+            if (entity instanceof RInteractableEntity interactable && interactable.getCallback() != null) {
+                interactable.getCallback().onAction(player, entity, action);
+            }
         });
         return null;
     };
 
     public REntityServer() {
         Core.getInstance().getServer().getPluginManager().registerEvents(this, Core.getInstance());
-    }
-
-    public void setCallback(EntityActionListener callback) {
-        boolean uninitialized = this.callback == null;
-        this.callback = callback;
-
-        if (uninitialized) {
-            TinyProtocol.instance.addFilter(ServerboundInteractPacket.class, filter);
-        }
+        TinyProtocol.instance.addFilter(ServerboundInteractPacket.class, filter);
     }
 
     public void addPlayer(Player player) {
@@ -293,13 +286,4 @@ public class REntityServer implements Listener {
     private long chunkToId(int x, int z) {
         return ((long) x << 32) + z;
     }
-
-    public enum EntityAction {
-        INTERACT,
-        ATTACK,
-    }
-
-    public interface EntityActionListener {
-        void onAction(Player player, REntity entity, EntityAction action);
-    }
 }

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RFallingBlockEntity.java

@@ -20,16 +20,21 @@
 package de.steamwar.entity;
 
 import de.steamwar.techhider.BlockIds;
+import lombok.AccessLevel;
 import lombok.Getter;
+import lombok.Setter;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.entity.EntityType;
 
 @Getter
-public class RFallingBlockEntity extends REntity {
+public class RFallingBlockEntity extends REntity implements RInteractableEntity<RFallingBlockEntity> {
 
     private final Material material;
 
+    @Setter
+    private REntityActionListener<RFallingBlockEntity> callback = null;
+
     public RFallingBlockEntity(REntityServer server, Location location, Material material) {
         super(server, EntityType.FALLING_BLOCK, location, BlockIds.impl.materialToId(material));
         this.material = material;

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RInteractableEntity.java

@@ -0,0 +1,34 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.entity;
+
+import org.bukkit.entity.Player;
+
+import java.util.function.BiConsumer;
+
+public interface RInteractableEntity<E extends REntity> {
+    REntityActionListener<E> getCallback();
+
+    void setCallback(REntityActionListener<E> callback);
+
+    default void setCallback(BiConsumer<Player, REntityAction> callback) {
+        setCallback((player, interaction, entityAction) -> callback.accept(player, entityAction));
+    }
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RInteraction.java

@@ -0,0 +1,116 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.entity;
+
+import de.steamwar.core.BountifulWrapper;
+import lombok.Getter;
+import lombok.Setter;
+import org.bukkit.Location;
+import org.bukkit.entity.EntityType;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+
+/**
+ * !! This class cannot be used in Versions lower than or equal to 1.19.4 !!
+ */
+@Getter
+public class RInteraction extends REntity implements RInteractableEntity<RInteraction> {
+
+    protected final Consumer<Object> updatePacketSink = o -> server.updateEntity(this, o);
+
+    @Setter
+    private REntityActionListener<RInteraction> callback = null;
+
+    private float interactionWidth = 1.0f;
+    private float interactionHeight = 1.0f;
+    private boolean responsive = false;
+
+    public RInteraction(REntityServer server, Location location) {
+        super(server, EntityType.INTERACTION, location);
+        server.addEntity(this);
+    }
+
+    @Override
+    protected void postSpawn(Consumer<Object> packetSink) {
+        super.postSpawn(packetSink);
+        sendPacket(packetSink,
+                this::getInteractionWidthData,
+                this::getInteractionHeightData,
+                this::getResponsiveData
+        );
+    }
+
+    @SafeVarargs
+    protected final void sendPacket(Consumer<Object> packetSink, BiConsumer<Boolean, BiConsumer<Object, Object>>... dataSinkSinks) {
+        List<Object> keyValueData = new ArrayList<>();
+        boolean ignoreDefault = packetSink == updatePacketSink;
+        for (BiConsumer<Boolean, BiConsumer<Object, Object>> dataSinkSink : dataSinkSinks) {
+            dataSinkSink.accept(ignoreDefault, (dataWatcher, value) -> {
+                keyValueData.add(dataWatcher);
+                keyValueData.add(value);
+            });
+        }
+        if (!keyValueData.isEmpty()) {
+            packetSink.accept(getDataWatcherPacket(keyValueData.toArray()));
+        }
+    }
+
+    public void setInteractionWidth(float interactionWidth) {
+        this.interactionWidth = interactionWidth;
+        sendPacket(updatePacketSink, this::getInteractionWidthData);
+    }
+
+    private static final Object interactionWidthWatcher = BountifulWrapper.impl.getDataWatcherObject(8, Float.class);
+
+    private void getInteractionWidthData(boolean ignoreDefault, BiConsumer<Object, Object> dataSink) {
+        if (ignoreDefault || interactionWidth != 1.0) {
+            dataSink.accept(interactionWidthWatcher, interactionWidth);
+        }
+    }
+
+    public void setInteractionHeight(float interactionHeight) {
+        this.interactionHeight = interactionHeight;
+        sendPacket(updatePacketSink, this::getInteractionHeightData);
+    }
+
+    private static final Object interactionHeightWatcher = BountifulWrapper.impl.getDataWatcherObject(9, Float.class);
+
+    private void getInteractionHeightData(boolean ignoreDefault, BiConsumer<Object, Object> dataSink) {
+        if (ignoreDefault || interactionHeight != 1.0) {
+            dataSink.accept(interactionHeightWatcher, interactionHeight);
+        }
+    }
+
+    public void setResponsive(boolean responsive) {
+        this.responsive = responsive;
+        sendPacket(updatePacketSink, this::getResponsiveData);
+    }
+
+    private static final Object responsiveWatcher = BountifulWrapper.impl.getDataWatcherObject(10, Boolean.class);
+
+    private void getResponsiveData(boolean ignoreDefault, BiConsumer<Object, Object> dataSink) {
+        if (ignoreDefault || !responsive) {
+            dataSink.accept(responsiveWatcher, responsive);
+        }
+    }
+}

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RPlayer.java

@@ -27,6 +27,7 @@ import de.steamwar.network.CoreNetworkHandler;
 import de.steamwar.network.NetworkSender;
 import de.steamwar.network.packets.common.PlayerSkinRequestPacket;
 import lombok.Getter;
+import lombok.Setter;
 import net.minecraft.network.protocol.game.ClientboundAddEntityPacket;
 import net.minecraft.world.phys.Vec3;
 import org.bukkit.GameMode;
@@ -39,7 +40,7 @@ import java.util.Map;
 import java.util.UUID;
 import java.util.function.Consumer;
 
-public class RPlayer extends REntity {
+public class RPlayer extends REntity implements RInteractableEntity<RPlayer> {
 
     private static final Object skinPartsDataWatcher = BountifulWrapper.impl.getDataWatcherObject(17, Byte.class);
 
@@ -48,6 +49,10 @@ public class RPlayer extends REntity {
     @Getter
     private final String name;
 
+    @Setter
+    @Getter
+    private REntityActionListener<RPlayer> callback = null;
+
     public RPlayer(REntityServer server, UUID uuid, String name, Location location) {
         super(server, EntityType.PLAYER, UUID.nameUUIDFromBytes(uuid.toString().getBytes(StandardCharsets.UTF_8)), location, 0);
         this.actualUUID = uuid;

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/TechHider.java

@@ -152,7 +152,7 @@ public class TechHider {
                 ClientboundSetHeldSlotPacket.class, // 7.1.104 Set Held Item (Player owning the channel)
                 ClientboundSetObjectivePacket.class, // 7.1.105 Update Objectives
                 ClientboundSetPlayerInventoryPacket.class, // 7.1.107 Set Player Inventory Slot (Player owning the channel)
-                ClientboundSetPlayerTeamPacket.class, // 7.1.108 Update Teams
+                // ClientboundSetPlayerTeamPacket.class, // 7.1.108 Update Teams
                 ClientboundSetScorePacket.class, // 7.1.109 Update Score
                 ClientboundSetSimulationDistancePacket.class, // 7.1.110 Set Simulation Distance
                 ClientboundSetSubtitleTextPacket.class, // 7.1.111 Set Subtitle Text

VelocityCore/build.gradle.kts

@@ -42,11 +42,12 @@ dependencies {
     implementation(project(":CommandFramework"))
 }
 
-tasks.register<DevServer>("DevVelocity") {
+tasks.register<VelocityServer>("DevVelocity") {
     group = "run"
     description = "Run a Dev Velocity"
     dependsOn(":VelocityCore:shadowJar")
     dependsOn(":VelocityCore:Persistent:jar")
     dependsOn(":VelocityCore:Dependencies:shadowJar")
     template = "DevVelocity"
+    packetDecodeLogging=true
 }

VelocityCore/src/de/steamwar/velocitycore/ServerStarter.java

@@ -106,7 +106,7 @@ public class ServerStarter {
     public ServerStarter event(EventFight eventFight) {
         arena(ArenaMode.getByInternal(eventFight.getSpielmodus()), eventFight.getMap());
         node = VelocityCore.local;
-        worldDir = EVENT_PATH;
+        worldDir = EVENT_PATH + "/" + serverToWorldName(Event.byId(eventFight.getEventID()).getEventName()) + "/" + eventFight.getStartTime().toLocalDateTime().format(DateTimeFormatter.ISO_LOCAL_DATE);
         worldCleanup = () -> {
         };
         arguments.put("fightID", String.valueOf(eventFight.getFightID()));
@@ -351,7 +351,7 @@ public class ServerStarter {
     }
 
     public static String serverToWorldName(String serverName) {
-        return serverName.replace(' ', '_').replace("[", "").replace("]", "");
+        return serverName.replace(' ', '_').replace("[", "").replace("]", "").replace(".", "");
     }
 
     public static void copyWorld(Node node, String template, String target) {

VelocityCore/src/de/steamwar/velocitycore/commands/CheckCommand.java

@@ -307,6 +307,13 @@ public class CheckCommand extends SWCommand {
                     return;
                 }
 
+                // Remove any added players from the schematic in the folder
+                for (SchematicNode schematicNode : SchematicNode.getSchematicNodeInNode(teamFolder.getNodeId())) {
+                    for (NodeMember nodeMember : NodeMember.getNodeMembers(schematicNode.getNodeId())) {
+                        nodeMember.delete();
+                    }
+                }
+
                 // Copy Schem into team folder of -1 user
                 String name = DateTimeFormatter.ofPattern("yyyy.MM.dd_HH:mm:ss").format(schematic.getLastUpdate().toLocalDateTime());
                 NodeData data = NodeData.getLatest(schematic);
@@ -316,14 +323,8 @@ public class CheckCommand extends SWCommand {
                 // Accept the team folder schematic and set other to Normal as well as adding the original owner on the schematic
                 node.setSchemtype(GameModeConfig.getBySchematicType(schematic.getSchemtype()).Schematic.Type);
                 NodeMember.createNodeMember(node.getNodeId(), schematic.getOwner());
-
-                // Remove any added players from the schematic in the folder
-                for (SchematicNode schematicNode : SchematicNode.getSchematicNodeInNode(teamFolder.getNodeId())) {
-                    if (schematicNode.getNodeId() == node.getNodeId()) continue;
-                    for (NodeMember nodeMember : NodeMember.getNodeMembers(schematicNode.getNodeId())) {
-                        NodeMember.createNodeMember(node.getNodeId(), nodeMember.getMember());
-                        nodeMember.delete();
-                    }
+                for (NodeMember nodeMember : NodeMember.getNodeMembers(schematic.getId())) {
+                    NodeMember.createNodeMember(node.getNodeId(), nodeMember.getMember());
                 }
 
                 // Conclude by setting send in schematic to normal and broadcast

VelocityCore/src/de/steamwar/velocitycore/commands/ReplayCommand.java

@@ -42,13 +42,6 @@ public class ReplayCommand extends SWCommand {
         super("replay");
     }
 
-    @Register
-    public void genericCommand(PlayerChatter sender) {
-        sender.system("REPLAY_UNAVAILABLE");
-        return;
-    }
-
-    /*
     @Register
     public void genericCommand(PlayerChatter sender, int replayId, @StaticValue(value = {"", "-a"}, allowISE = true) @OptionalValue("") boolean isAdmin, @OptionalValue("") String optionalMap) {
         Fight fight = Fight.getById(replayId);
@@ -64,6 +57,9 @@ public class ReplayCommand extends SWCommand {
     @Register
     public void genericCommand(PlayerChatter sender, @OptionalValue("") String optionalMap) {
         if (PunishmentCommand.isPunishedWithMessage(sender, Punishment.PunishmentType.NoFightServer)) return;
+        if (!sender.user().hasPerm(UserPerm.TEAM)) return;
+
+
 
         new SWStreamInv<>(sender, new Message("REPLAY_TITLE"), (click, fight) -> {
             startReplay(sender, click.isShiftClick(), optionalMap, fight);
@@ -72,6 +68,7 @@ public class ReplayCommand extends SWCommand {
 
     private void startReplay(PlayerChatter sender, boolean isAdmin, String optionalMap, Fight fight) {
         if (PunishmentCommand.isPunishedWithMessage(sender, Punishment.PunishmentType.NoFightServer)) return;
+        if (!sender.user().hasPerm(UserPerm.TEAM)) return;
 
         GameModeConfig<String, String> mode = ArenaMode.getBySchemType(fight.getSchemType());
         ServerStarter starter = new ServerStarter().replay(fight.getFightID()).blueLeader(sender.getPlayer());
@@ -116,5 +113,5 @@ public class ReplayCommand extends SWCommand {
     private Message parseLeader(SteamwarUser leader, int players, boolean winner) {
         return new Message("REPLAY_" + (players > 1 ? "" : "SOLO_") + (winner ? "WINNER" : "LOSER"), leader.getUserName(), players - 1);
     }
-    */
+
 }

buildSrc/src/steamwar.devserver.gradle

@@ -27,8 +27,7 @@ plugins {
 class DevServer extends DefaultTask {
 
     @Input
-    @Optional
-    String worldName = null
+    boolean debug = false
 
     @Input
     String template = null
@@ -84,10 +83,13 @@ class DevServer extends DefaultTask {
                 }
             }
 
-            if (worldName == null) worldName = properties.get("worldName")
+            worldName = properties.get("worldName")
             host = properties.get("host")
             debugPort = new Random().nextInt(5001, 10000)
 
+            if (worldName == null) {
+                throw new GradleException("Please supply the 'worldName' in a 'steamwar.properties' files either in this project dir or any parent project!")
+            }
             if (host == null) {
                 throw new GradleException("Please supply the 'host' in a 'steamwar.properties' files either in this project dir or any parent project!")
             }
@@ -95,7 +97,7 @@ class DevServer extends DefaultTask {
         doLast {
             setupTemplate(template)
             uploadDependencies()
-            startDebugPort()
+            if (debug) startDebugPort()
             startDevServer()
         }
         finalizedBy(new Finalizer())
@@ -113,6 +115,9 @@ class DevServer extends DefaultTask {
     @Internal
     Boolean running = true
 
+    @Internal
+    String worldName = null
+
     class Finalizer extends DefaultTask {
 
         Finalizer() {
@@ -241,7 +246,7 @@ class DevServer extends DefaultTask {
             devPy.append(" -D${dParam.key}=${dParam.value}")
         }
         devPy.append(" $template")
-        devPy.append(" -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:$debugPort")
+        if (debug) devPy.append(" -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:$debugPort")
         if (jvmArgs != null) devPy.append(" $jvmArgs")
         println("Starting $template with command ${devPy.toString()}")
 
@@ -278,6 +283,19 @@ class DevServer extends DefaultTask {
     }
 }
 
+class VelocityServer extends DevServer {
+    @Input
+    @Optional
+    Boolean packetDecodeLogging = false
+
+    VelocityServer() {
+        super()
+        doFirst {
+            if (packetDecodeLogging) dParams.put("velocity.packet-decode-logging", "true")
+        }
+    }
+}
+
 class FightServer extends DevServer {
 
     @Input